Manufacture of artificial stone.



l i i to of artificialstone-suitable for building matea ment of said materials to obtain an artificial.

'. Bavmg twenty per cent. of sulfuric acid-and 35 ter an med. The abovem'ateria aret COMPOSITIONS, GOAll cement 8 NI TED STATES ii-9S3 deference PATENT OFFICE.

PROSPER CABRIE, OF NEWYORK, N. Y:

MANUFACTURE or ARTIFICIAL STONE."

. l h v SPECIFICATION forming part of Letters Patent No. 679,828, dated August 6, 1901.

c Serial No. 83,959. (No specimens.)

Appllcatlonfiled October- 22,1900.

To all whom it may concern: r

Be it known that I, PROSPER came, a citizen of France, residing at New York city, in

" the county of New York and State. of New 5 York, have invented certain new and useful Improvements in the Manufacture of Artificial Stone, of which the following is a specification. This invention relates to the manufacture rial, which can be left exposed to theair and. changes of weather and be free from eiflorescence, and thereby dispensing with repeated painting and also possessing strength and r5 hardness; a

It consists of the combination of ingredi-- cuts, as will be hereinafter particularly described,'and specifically defined in the claims. The composition of materials and the treat stone closely imitating light-shade natural sandstone, mainly for ornamentations and. moldings and at greatly-reduced cost, is sub-' stantially by the union of the following sub- 2 5 stances in theproportions given, as follows? twenty-five kilos of Portland ment, mark grapierfwhich is" 1g t gray an ardehs. s on y; seventy-five kilos of Portland cement markfRo ueford which is ye owan' ar- 36 dens quicE iy; fwentyfive-kilos of gray hydrauliclime which has beeuglake dgr wa er j lried and powdered, and one un re 110s d with soft w hor- oughly mixed together as one material, which is placed in barrels and the latter closed to exclude dampness, or it may be used immediately after the mixture has been made.

The treatment of the above composition to gobtain moldings of artificial stone is as fol -lws: Said; composition isdumped on afloor "or in a suitabletrough, water is added and .mixed'with it to produce t e proper consist ency, as commonly done with cements, and a portion'of it is. poured and evenly distributed into molds. Said molds may be of plaster-of-paris or of gelatin, the latter being prein presence of two ferred, as the cement composition setsrapidly o in ten or twelve minutes. The reproduction is thus obtained and the mold is removed without any material injury or wear to'said '1 mold, as it has a certain amount of elasticity.

"as set forth.

.cial stone having agough surface, which com- 4 Witnesses Within a few hours after the artificial stone has been molded, and thus preferably while it is still damp, its smooth-appearing surface is removed with some of the well-known tools used by stone-cutters andsculptors, after which the sample of stone is left to dry in the shade for ten or twelve days, after which it r is washed with water containing twenty to twenty-five per cent. ofmuriatic acid, which indurates the stone and removes'any appearingsaltpeter. t

When the artificial stoneis made directly upon the face of walls, the same materials are used in the proportions above given, following the well-known rules employed in working with cement. The surface is then roughened, if desired, within a few hours and before it is too dry, and ten or twelve'days later the face of the stone is washedygith ater containingtwenty 'per cent? @1" muriatic ac d The above named'jbrands of cement used are preferred, because they combine well to- 7 5 gether and the stone obtained is free from ter effioresggnce but ogre; b inds haw salt ttfisssae eh rsaemea Qualities may be used. to obtain the desiredartiflcial stone. .Having" awfully described my invention,

urated artificial stone having a rough surface, and comprised of a slowly'-har-- dening Portland cement, a quickly-hardening Portland cement,hydraulic lime slaked with watercontaini ng sulfuric acid, and sand, as

described and in the proportions substantially 1- 2. The processof manufacturing an a'rtifi- 9 prisesamixture'of slowly-hardening Portland cement, a quickly-hardening. Portland cement, hydraulic lime slaked with' acidulated water, and sane." in the proportions set forth,

with water, pouring the whole into molds and 4 allowing the mixture" to set, then removing the stone thusformed,rougheniug itssnrface, drying it, and finally washing it with water containing twenty per cent.- of muriatic acid,- substantially as described. In testimony. whereof I aflix my signature witnesses. 1 BROSPER CABRIE.

. E. E. MASSON, R,- .F. ronu- Examine: 

